Seed
Individual seeds sold in packets or larger quantities. Check the catalog for packet contents, variety descriptions, and ordering details.
REGIONAL SEED SOURCING
A practical guide to buying regional seeds
Learn how climate specialization, seed provenance, ordering methods, and catalog descriptions can help you evaluate seed sellers beyond their state or location.
Find Your USDA ZoneWhy regional seed sourcing matters
Two gardens in the same state can experience very different growing conditions. Elevation, winter temperatures, summer heat, rainfall, humidity, and growing-season length all influence the environment in which plants grow.
A seed catalog organized around a seller's regional climate knowledge can provide useful context that a simple state-based search does not.
Regional specialization is not a guarantee that every variety in a catalog will suit every garden. It is a reason to investigate the seller's growing focus, descriptions, and individual seed information.
Look beyond state boundaries
State boundaries are administrative divisions, not climate boundaries. A seller may describe its specialization around a particular growing region, habitat, or climatic condition that crosses several states.
SeedsByZone records these descriptions using the seller's own published wording. A seller is not assigned a climate specialization simply because its business operates in that location.
CLIMATE BASICS
Understanding USDA hardiness zones
The USDA Plant Hardiness Zone Map organizes locations according to average annual extreme minimum winter temperatures. It provides a reference for comparing winter cold conditions across different locations.
The map divides the United States into numbered hardiness zones, with half-zone subdivisions for additional detail.
What a hardiness zone does tell you
- It provides a standardized reference for average annual extreme minimum winter temperatures.
- It helps compare the winter-temperature conditions associated with different locations.
- It provides a common reference when reading plant and seed information that specifies hardiness zones.
What a hardiness zone does not tell you
- Your complete growing-season length.
- Your garden's soil composition or drainage.
- Your local rainfall or irrigation requirements.
- Your garden's summer heat or humidity conditions.
- Whether a particular seed variety will germinate or produce a particular yield.
Use a hardiness zone as one reference point, rather than treating it as a complete description of your growing environment.
Consult the USDA Plant Hardiness Zone Map for the official reference.
SEED PROVENANCE
Ecotypes and seed provenance explained
What is an ecotype?
An ecotype is a population within a species associated with particular environmental conditions. Populations of the same species can have different characteristics associated with the environments in which they occur.
In seed sourcing, ecotype information can help explain the regional or ecological context behind a seed collection.
What is seed provenance?
Provenance refers to the geographic origin or source history of plant material. Knowing where seeds originated can provide additional context when evaluating a seller's descriptions.
A seller's location is not necessarily the origin of its seeds. A business may operate in one state while sourcing seed from another location.
Questions to ask about provenance
- Where were the seeds originally collected or produced?
- Does the seller identify a specific geographic region?
- Does the catalog distinguish local seed from other sources?
- Is the provenance information specific to the individual variety?
- Can the seller explain its sourcing terminology?
Do not assume a seed is locally adapted, locally collected, or genetically distinct unless the seller's information supports that description.
ORDERING AND SEED FORMATS
Understanding seed formats
Sellers may offer seeds in different physical formats. The format affects how a product is packaged and ordered, not necessarily its growing characteristics.
Plugs
Young plants grown in small individual growing cells. Sellers may describe plug availability by plant type, tray format, or ordering quantity.
Container stock
Plants supplied in growing containers. Container sizes and plant availability vary by seller and catalog.
Bare-root
Dormant plants supplied without soil surrounding their roots. Check the seller's handling, shipping, and planting instructions.
Plugs versus pots
Plugs and container-grown plants are different purchasing formats. A plug is typically supplied in a smaller growing cell, while container stock is supplied in a growing container.
When comparing sellers, look at the actual format offered, the quantities available, and the seller's own handling and planting information.
A format label alone does not establish plant maturity, quality, or suitability.
HOW TO ORDER
Small-packet versus bulk seed ordering
Online small-packet ordering
Small-packet ordering allows customers to select individual seed packets through an online catalog. It provides a way to compare varieties and review the information attached to each listing.
Before ordering, check the packet quantity, variety name, product description, and any ordering restrictions stated by the seller.
Catalog mail-order
Some sellers publish printed or downloadable catalogs and accept orders through a mail-order process.
Review the catalog's ordering instructions, available formats, payment requirements, shipping information, and any stated minimums.
Buying in bulk
Bulk ordering generally involves purchasing larger quantities than individual retail packets. The exact meaning of bulk varies by seller and product.
Ask the seller about package quantities, minimum orders, seed specifications, and shipping arrangements before purchasing.
Which ordering model should you choose?
Consider how much seed you need, the varieties available, the seller's ordering requirements, and whether the seller offers the format you want.
SeedsByZone distinguishes three published ordering models:
- Online small-packet: published online packet ordering.
- Catalog mail-order: published catalog-based mail ordering.
- Both: both methods are supported by the seller's published information.
These classifications describe ordering methods, not seller quality or product suitability or growing results.
SHOPPING WITH CONFIDENCE
How to read a seed catalog
A seed catalog contains more than variety names. Its descriptions can help you understand what a seller offers, how products are packaged, and what information is available about individual seeds.
Check the variety description
Read the complete description rather than relying on a product name or photograph. Look for information about the plant, growing conditions, and any characteristics the seller specifically identifies.
Look for growing information
Some catalogs publish planting instructions, growing-season information, or other cultivation details. Check whether this information applies to the specific variety you are considering.
Understand packet quantities
Packet descriptions can differ between sellers. Check the stated seed count, weight, quantity, or other unit used to describe the package. Do not assume that similarly named packets contain equivalent quantities.
Check availability and ordering conditions
Review current availability, shipping terms, order minimums, and any restrictions before placing an order. Catalog information can change between editions.
BEFORE YOU ORDER
Questions to ask a seed seller
When a catalog does not answer an important question, contacting the seller can help clarify its published information and current offerings.
- What climate or growing region does the seller specialize in?
- Where did the seed originate, if provenance is important to you?
- Does the seller publish specific USDA hardiness-zone information?
- Are growing instructions available for the individual variety?
- Are seeds sold in individual packets or larger quantities?
- Does the seller offer online ordering, catalog mail-order, or both?
- What are the current shipping requirements and order minimums?
- Is the product currently available?
Not every seller will publish answers to every question. Treat missing information as something to confirm rather than something to assume.
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Find seed sellers that publish a regional focus
Use the USDA zone lookup or browse the directory by climate region. Every published seller record includes its source and checked date.